[Remote Motorized Control]: The damper features a AC 24V electric actuator. Simply connect the switch to the actuator following the wiring diagram to enable remote valve control. It absorbs vibration and minimizes operational noise. [Stainless Steel]:The body is made from stainless steel material, material resists rust and superbly,ensuring reliable performance even in humid and high-temperature conditions. [Leak-Proof Silicone Seal Ring]:The air damper features an internal silicone seal ring, ensuring reliable airtightness and preventing gas leakage when the valve is closed. [Easy Installation]:Step 1: Prepare & Position Measure duct dimensions and determine installation location Slide valve body into ventilation duct : Align & Secure Connect dual ducts according to airflow direction on valve housing Fasten damper with standard duct clamps " [Wide Range of Applications]: The Damper primarily used for airflow control in commercial HVAC systems, industrial ventilation systems, home ventilation systems-heating duct /refrigeration, home ventilation systems-Grill with firebox/smoke stacks." Color: Silver Material: Stainless Steel Package Contents: 1 x valve Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.